[Boatanchors] Handbook 6CW4 6m converter

[RJ Mattson]

John
If you have the 1966-68 ARRL handbook, it is the featured 6m converter.
I have followed the alignment procedure, but the rf stage is still unstable.
Works great with the rf tube pulled and the antenna connected to the mixer
hi.
I am going to try a metal partition separating the rf stage grid and plate
tanks and bypassing the filaments.
The neutralizing LC network also uses a disc cap and will replace it with a
silver mica .001
Don't know what else to try?
Bob...W2AMI

----- Original Message -----
From: "WB6BLV" <WB6BLV@inreach.com>
To: "RJ Mattson" <rjmattson@hvi.net>
Subject: Re: [Boatanchors] 6CW4 vs Ameco 6m converter CB-6


> I have a 6CW4 converter on 10 and
> on 6.....one is commercial and the other
> is ARRL handbook.  Can you give me
> a scan of the one you need to neutralize?
>
> The non-commercial one has a variable
> inductor for neutralization, which is the
> opposite of what you normally see.
>
> The commercial unit has a standard variable
> cap (trimmer) from plate to bottom of grid
> coil, and is very stable.  I did have to solder
> a wire to the 6CW4 case, and clip to chassis,
> on the non-commercial one, and with the
> variable inductor, it still "takes off" once in a
> while.
>
> Have been looking at converters in several
> old ARRL Handbooks....found two 6CW4
> ccts....sure wish I had the one for 1.25 meters!
>
> John
>